One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,7,11,6,3,5,9)(4,12,16,8,15,13,14,10)(17,18)(19,27)(20,23)(21,25)(22,26)(24,28)(29,31)(30,32)(1,3,6,2)(4,13,15,12)(5,9,7,11)(8,14,10,16)(17,18)(19,24)(20,25)(21,23)(22,26)(27,28)(29,32)(30,31)(2,3)(8,10)(9,11)(12,13)(18,23)(20,21)(24,27)(25,26)(28,30)(31,32) involution — undirected(1,4,6,15)(2,8,3,10)(5,16,7,14)(9,13,11,12)(17,19)(18,24)(20,30)(21,28)(22,29)(23,27)(25,31)(26,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.